S-Registers - Thermo Scientific V.22/212A User Manual

C
&C1: DCD is on when carrier from remote modem is detected
C
&D0: modem ignores DTR signal
C
&G0: no guard tone
C
&J0: auxiliary telco leads disabled
C
&L0: Dial-Up Line (command not supported in modem chip-set)
C
&P0: Pulse Dial Mode U.S. timing
C
&Q0: Asynchronous mode (same as &M0 command)
C
&R0: CTS tracks RTS
C
&S0: DSR always on
C
&X0: modem generates internal transmit clock signal

3.1.2 S-Registers

The S-Registers are memory locations that contain additional configuration data for modem
operation. Refer to Table 9 in the Reference Material Section for the factory values stored in the S-
Registers. Registers 13, 15, 19, 20, and 24 are used. The information in S-Registers 14, 21, 22, 23,
and 27 is the bit-mapped data containing the accumulated information of all the other S-Registers
and is stored in the NVMEM.
Any S-Register can be monitored using the AT-command "ATSn?" ("Sn" represents the number of
the S-Register to be viewed). For example, to view the value set in S-Register #1, enter the
command "ATS1?". The value of a S-Register can be changed using "ATSn=n" ("Sn" represents the
number of the S-Register to change and "n" represents the new numeric value to be placed in the
register). For example to change the value of S-Register #1 to 3, enter the command as "ATS1=3".
S-Register descriptions are as follows:
S0 (Ring to Answer On): Sets the number of rings that the modem is to automatically answer on.
A value of 0 rings disables the automatic answer function of the modem. The maximum ring setting
is 255.
S1 (Ring Count): The modem uses this register to count the number of incoming rings. If no ring
occurs for an eight second interval, the count is defaulted to zero.
S2 (Escape Sequence Character): This register contains the ASCII value of the escape sequence
character (default value is the ASCII 43, the plus sign (+)). Values of 0-127 may be entered in this
register. A value greater than 127 disables the escape sequence function, preventing the user from
changing the modem operation from the on-line mode to the command mode while maintaining on-
line connection with a remote system.
S3 (Carriage Return Character): This register contains the ASCII value of the carriage return
character (default value is the ASCII 13). Values of 0-127 may be entered in this register.
S4 (Line Feed Character): This register contains the ASCII value of the line feed character
(default value is the ASCII 10). Values of 0-127 may be entered in this register.
14